[backend] "obsname" is now available from BSConfiguration

Without this change, bs_worker logs this message to syslog:
Shutting down obsworkerName "BSConfig::obsname" used only once: possible
typo at ./bs_worker line 2187.
[backend] ensure to use BSConfiguration at all places for the future
add timestamp to log lines in bs_dispatch
[api] cleanup refactored functions from code quality test blacklist